Vertical CNT-Si Photodiode Array

A photodiode consisting of nanopillars of thin-film silicon p-i-n on an array of vertically aligned carbon nanotubes (CNTs) with a noncontinuous cathode electrode is demonstrated. The structure exploits the intrinsic enhancement of the CNTs electric field, which leads to reduction in the photodiodes...

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Bibliographic Details
Published inarXiv.org
Main Authors Ahnood, Arman, Zhou, Hang, Dai, Qing, Vygranenko, Yuri, Suzuki, Yuji, Esmaeili-Rad, M R, Amaratunga, Gehan, Arokia Nathan
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.06.2024
Subjects
Arrays
Carbon nanotubes
Computed tomography
Electric fields
Optical coupling
Photodiodes
Physics - Instrumentation and Detectors
Physics - Optics
Silicon
Thin films
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Summary:A photodiode consisting of nanopillars of thin-film silicon p-i-n on an array of vertically aligned carbon nanotubes (CNTs) with a noncontinuous cathode electrode is demonstrated. The structure exploits the intrinsic enhancement of the CNTs electric field, which leads to reduction in the photodiodes operating voltage and response time and enhancement of optical coupling due to better light trapping, as compared with the conventional planar photodiode. These improvements translate to higher resolution and higher frame rate flat-panel imaging systems for a broad range of applications, including computed tomography and particle detection.
ISSN:2331-8422
DOI:10.48550/arxiv.2406.14818